1.   As the enclosed instructions reveal, two hollow balls are inserted into the tube.

2.   Ball-type faucets control water flow with a hollow ball.

3.   Hammering the hollow ball is a simple tonic that can purge all that ails you.

4.   Rallying with another beginner, the first thing I noticed was how little the hollow black ball bounced after it hit the floor.

5.   Starshine, a hollow ball studded with tiny mirrors, was created by kids in Utah, with help from students around the world.

6.   The players play with a hollow plastic ball that rattles as it moves, an ordinary cricket bat and iron stumps.

7.   Zachary Jones was the second infant to suffocate when half of the hollow ball, about the size of a tennis ball, covered his mouth and nose.